Aimed at low-handicappers and pros the 919 Tour model replaces the 900 Tour a.k.a. the Brooks Koepka model and features an improved shape with a bit thinner topline that the many Tour players who game the iron prefer. A new more durable Pearl Brush finish reduces glare while providing a bit more refined look than the previous matte finish.
Check them out and see if one is right for you but keep in mind the TS2 is aimed at those who want high launch low spin distance and forgiveness while the TS3 is aimed at those who want mid launch low spin and enhanced workability.
This extra degree of strength allows for a thinner more flexible clubface and enhanced ball speed at impact. The thinner clubface along with a new hidden micro-slot in the sole not only increases COR but also expands the effective hitting area across a larger area. The micro-slot also allows for more weight to be redistributed for a lower and deeper CG location yielding improved launch on mid and long iron shots.